Troubleshooting* 19
Fault Possible Causes Solution
Over Current
Shorted output Check for any shorts in motor cables.
Damaged wire insulation Check motor wire insulation with a megger.
Over Voltage
Internal Drive short
With power to Drive off, measure outputs
with ohmmeter to detect short.
Power cycling on and off
Check for a generator or switching on input
line.
High line voltage
MeasureincominglinevoltagetoDrive;
should be between 190V and 265V.
Under Voltage
Low line voltage
Temporary loss of power Check for local power outage.
Excessive load current
Check motor is correctly sized for the
application.
Loss of a motor phase
Check correct voltage is present on all motor
leads.
Power was removed from
Drive
Check correct voltage is present on all input
lines.
Cannot Start Motor
Exceeding Service Factor Amps
Check Service Factor Amps entered are
correct.
Check pump and motor are correct.
No Service Factor Amps value
entered
Check Service Factor Amps entered and are
correct.
There is an open (connection)
in motor wires
Check resistance of all motor wires is
correct.
Locked rotor Pull pump check for debris in pump.
Dry Run
Operation at open discharge
MayneedtoreduceDry Run Sensitivity
pressure or apply back pressure on
transducer.
Drive cannot read transducer
signal
Check linearity of transducer, as it may be
damaged. See Troubleshooting Guide for
more information.
Possible leak Check for pipe break or large leak.
Dry running pump Check water level in well.
Ground Fault
Ground wire shorted to motor
phase
Check the ground wire for short to motor
phase wire or check insulation integrity with
a megger.
Long motor cable length
Motorcablelengthmorethan1000ftisnot
recommended.
System Not Grounded
Ungrounded Drive
Ground Detect parameter can be disabled,
but will reactivate after 72 hours.
Unbalanced or three phase
incoming voltage.
Line to line voltage must be twice line to
ground voltage.
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